NEXTDC LIMITED — Director's Dealing 2026

May 20, 2026

Appendix 3Y

Change of Director's Interest Notice

Rule 3.19A.2

Appendix 3Y

Change of Director's Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX's property and may be made public.

Introduced 30/09/01 Amended 01/01/11

Name of entity	NEXTDC Limited
ABN	35 143 582 521

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	Mrs Deborah Page
Date of last notice	3 November 2025

Part 1 - Change of director's relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of "notifiable interest of a director" should be disclosed in this part.

Direct or indirect interest	Direct & Indirect
Nature of indirect interest (including registered holder)
Note: Provide details of the circumstances giving rise to the relevant interest.	Mattenjac Investments Pty Limited ('MIPL') as the Trustee for the Page Superannuation Fund (the 'Fund'). Mrs Page is a director and beneficiary of the Fund.
Date of change	18 May 2026
No. of securities held prior to change	3000 fully paid Ordinary Shares held by Mrs Page;
1500 fully paid Ordinary Shares held by the Fund.
Class	Ordinary Shares (acquired pursuant to the Entitlement Offer announced by NEXTDC Limited on 20 April 2026).
Number acquired	556 shares acquired by Mrs Page
278 shares acquired by the Fund
Number disposed	Nil
Value/Consideration
Note: If consideration is non-cash, provide details and estimated valuation	$12.70 per share

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 1

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Appendix 3Y

Change of Director’s Interest Notice

No. of securities held after change	3,556 fully paid Ordinary Shares held by Mrs Page; 1,778 fully paid Ordinary Shares held by the Fund.
Nature of change
Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back	Ordinary Shares acquired pursuant to the Entitlement Offer announced by NEXTDC Limited on 20 April 2026.

Part 2 – Change of director’s interests in contracts

Note: In the case of a company, interests which come within paragraph (ii) of the definition of “notifiable interest of a director” should be disclosed in this part.

Detail of contract	N/A
Nature of interest	N/A
Name of registered holder (if issued securities)	N/A
Date of change	N/A
No. and class of securities to which interest related prior to change
Note: Details are only required for a contract in relation to which the interest has changed	N/A
Interest acquired	N/A
Interest disposed	N/A
Value/Consideration
Note: If consideration is non-cash, provide details and an estimated valuation	N/A
Interest after change	N/A

Part 3 – ${}^{+}$ Closed period

Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required?	No
If so, was prior written clearance provided to allow the trade to proceed during this period?	N/A
If prior written clearance was provided, on what date was this provided?	N/A

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011